I run big incubators and hatchers and I keep a pan of water in both but just to give them SOME humidity. I do not monitor them eally and I hatch hundreds of birds every 21 days no problem. If I DO have one having trouble getting out, I wet a towel and throw it in the bottom for extra moisture. If you try to keep it where it says you will work yourself to death. When I had a little styrofoam incubator all I had to do to make the humidity drop was cover part of the channel with tin foil. Humidity is from the SURFACE AREA of water, not the depth. The more surface area of water the more humidity, the less water surface the less humidity, so covering half of the channel with tin foil will make it drop. Hope that helps.